Trillium albidum, also known as giant white wakerobin, white toadshade, and sweet trillium, is a species of flowering plant in the family Melanthiaceae. The species is endemic to the western United States, ranging from west-central California through Oregon to southwestern Washington. It is found in diverse habitats, on the moist slopes of mixed deciduous-coniferous forests, among shrubs and thickets, and along stream banks and river beds.
Trillium albidum is a perennial herbaceous plant that spreads by means of underground rhizomes. There are three large leaf-like bracts arranged in a whorl about a scape that rises directly from the rhizome, growing to 22 to 58 cm (8.5 to 23 in) in height. The bracts are sessile and broadly ovate, each 10 to 20 cm (4 to 8 in) long and 12 to 15 cm (4.5 to 6 in) wide. The blades are green and weakly mottled with brown or dark green spots (which often fade later in the season). (Wikipedia) Photo credit Eric in SF CC BY-SA 3.0